Steven Rostedt wrote on Sat, Dec 02, 2023 at 11:15:24PM -0500: > > Also, for custom tracepoints e.g. bpftrace the program needs to know how > > many bytes can be read safely even if it's just for dumping -- unless > > dynamic_array is a "fat pointer" that conveys its own size? > > (Sorry didn't take the time to check) > > Yes, there's also a __get_dynamic_array_len(line) that will return the > allocated length of the line. Is that what you need? Yes, thanks! So the lower two bytes of the field are its position in the entry and the higher two bytes its size; ok. It doesn't look like bpftrace has any helper for it but that can probably be sorted out if someone wants to dump data there. Let's update the event to use a dynamic array and have printk fomrat to use %*ph with that length. JP Kobryn, does that sound good to you? I'm not sure what you were trying to do in the first place. Do you want to send a v2 or shall I? -- Dominique Martinet | Asmadeus
